[OPDATA-6166] Returning calculated-multi-function as a decimal with no scalar

[chray-zhang]

Closes OPDATA-6166

Description

• Added decimal support to decode hex to decimal and return decimal results as well as decimal places

Steps to Test

curl -X POST http://localhost:8080 \
  -H "Content-Type: application/json" \
  -d '{
    "data": {
      "endpoint": "calculated-multi-function",
      "functionCalls": [
        {
        "name": "result",
        "address": "0x9D39A5DE30e57443BfF2A8307A4256c8797A3497",
        "inputParams": [
          "1000000000000000000"
        ],
        "network": "ethereum",
        "resultField": "price",
        "signature": "function previewRedeem(uint256) external view returns (uint256 price)",
        "decimals": 0
      }
      ],
      "aptosCalls": [],
      "constants": [],
      "operations": []
    }
  }' | jq
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  1123  100   591  100   532    416    374  0:00:01  0:00:01 --:--:--   790
{
  "data": {
    "result": "1225619006177976307"
  },
  "statusCode": 200,
  "result": "1225619006177976307",
  "timestamps": {
    "providerDataRequestedUnixMs": 1774979153846,
    "providerDataReceivedUnixMs": 1774979154301
  },
  "meta": {
    "adapterName": "VIEW_FUNCTION_MULTI_CHAIN",
    "metrics": {
      "feedId": "{\"functionCalls\":[{\"name\":\"result\",\"signature\":\"function previewredeem(uint256) external view returns (uint256 price)\",\"address\":\"0x9d39a5de30e57443bff2a8307a4256c8797a3497\",\"inputParams\":[\"1000000000000000000\"],\"network\":\"ethereum\",\"decimals\":0}],\"aptosCalls\":[],\"constants\":[],\"operations\":[]}"
    }
  }
}

Quality Assurance

• [x ] If a new adapter was made, or an existing one was modified so that its environment variables have changed, update the relevant infra-k8s configuration file.
• [x ] If a new adapter was made, or an existing one was modified so that its environment variables have changed, update the relevant adapter-secrets configuration file.
• [x ] If a new adapter was made, or a new endpoint was added, update the test-payload.json file with relevant requests.
• [x ] The branch naming follows git flow (feature/x, chore/x, release/x, hotfix/x, fix/x) or is created from Jira.
• [x ] This is related to a maximum of one Jira story or GitHub issue.
• [x ] Types are safe (avoid TypeScript/TSLint features like any and disable, instead use more specific types).
• [x ] All code changes have 100% unit and integration test coverage. If testing is not applicable or too difficult to justify doing, the reasoning should be documented explicitly in the PR.

[changeset-bot]

🦋 Changeset detected

Latest commit: ebbc179

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@chainlink/view-function-multi-chain-adapter	Minor

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Click here if you're a maintainer who wants to add another changeset to this PR

[Copilot]

Pull request overview

Adds optional decimal scaling support to the calculated-multi-function endpoint in the view-function multi-chain adapter, changing how EVM call results are decoded/returned.

Changes:

• Added optional decimals input to scale single-return EVM results using ethers.formatUnits.
• Updated transport to decode single-return function outputs into decimal strings (and keep raw hex for multi-return).
• Added integration tests + snapshot updates and a changeset entry.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
packages/sources/view-function-multi-chain/src/transport/calculated-multi-function.ts	Decodes EVM call results; adds decimal scaling logic and changes single-output return format.
packages/sources/view-function-multi-chain/src/endpoint/calculated-multi-function.ts	Adds decimals as an optional request parameter for function calls.
packages/sources/view-function-multi-chain/test/integration/adapter.test.ts	Adds integration tests for decimals scaling and decimals=0 behavior.
packages/sources/view-function-multi-chain/test/integration/snapshots/adapter.test.ts.snap	Updates snapshots to reflect decoded decimal output and new decimals-scaling cases.
.changeset/jolly-maps-cross.md	Declares a version bump for the adapter package.

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[dskloetc]

Do we need this? Can't we just multiply?